Fan for grain-separators.



B. E. woonsumn FAN FOR GRAIN SEPAR ATORS. APPLICATION FILED JAN. I0, 1916.

1,237,437, Patented Aug. .21, 1917.

BYRON E. WOODBUBY, OF ABERCROIVIBIE, NORTH DAKOTA.

FAN FOR GRAIN-SEPARATORS.

Specification of LettersjEatent.

Patented A11 21, 1917.

Application filed January 10, 1916. Serial No. 71,260.

To all whom it may concern:

Be it known that I, BYRON E. WOODBURY, a citizen of the United States, residing at Abercrombie, in the county of Richland, State of North Dakota, have invented certain new and useful Improvements in Fans for Grain-Separators; and I do hereby de- Clare the following to be a full, clear, and exact description of the invention, such as will enable others shlled in the art to which it appertains to make and use the same.

This invention relates to fans for grain separators.

Heretofore in cases where a large fan is used for blowing the chaff from the grain on the sieves it has been found that very little wind is produced in the center of the sieves with a resultant inefficient separation of the chaff from the grain. It is therefore the object of the present invention to provide a fan structure for grain separators whereby the blast of the fan will be evenly distributed over the entire extent of the fan and a more eflicient separation of the chaff from the grain had.

With the above and other objects in view the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully described and particularly pointed out in the appended claim.

In describing the invention in detail reference will be had to the accompanying drawings wherein like characters of reference denote corresponding parts in the sev eral views, and in which Figure 1 is a side elevation of a fragment of a grain separator with the improved fan structure applied;

Fig. 2, a plan view of what is shown in Fig. 1; I

Fig. 3, a section on the line 3-3 of Fig. 2, and

Fig. 4, a perspective view of the fan detached.

Referring to the drawings A indicates the body of a grain separator which includes side members 10 and 11 and a bottom 12. The side members 10 and 11 are provided with alined openings 13 and 14 respectively.

Secured against the outer side of the side member 10 is a sill 15 which extends across the opening 13. Likewise there is secured against the side member 11 a sill 16 which extends across the opening 14. Rotatably mounted in suitable bearings 17 carried by the sills'15 and 16 respectively is a fan shaft 18. Mounted on the shaft 18 at spaced points is a plurality of radial arms 19 to which are secured fan blades 20. The inner edges of each of the blades 20 are inclined from a point adjacent the center of the blade toward each end of the blade as at 21. Mounted on the sill 15 and extending parallel to the shaft 18 on either side of the latter are arms 22 which support a tubular member 23, it being here noted that the shaft 18 and the tubular member 23 are arranged concentric with respect to the opening 13 and that said tubular member extends a considerable distance into the space rovided by the inclined edges 21 of. the fan lades. Likewise there is mounted on the sill 16 on either side of the shaft 18 arms 24 which extend parallel to said shaft and support a tubular member 25, the latter extending a considerable distance into the space provided by the inclined edges 21 of the fan blades.

In the operation of the structure it will be apparent that as the fan is rotated air will be drawn inwardly through the tubular members 23 and 25 and delivered approximately at the center of the fan, the result being that a proper supply of air is provided at the center of the fan so that an even blast'of air is produced by the fan throughout the entire longitudinal extent thereof. It will thus be obvious that a fan structure of the type described will efficiently separate the chafi from the grain throughout the entire width of the sieve.

What is claimed is:

In a fan structure for grain separators, the combination of a casing, a fan including a shaft, bearings for said shaft secured to the casing, bars extending parallel to the shaft on each side thereof and secured to the casing simultaneously with the bearings, tubes mounted on said bars at the ends of the fan respectively and extending inwardly In testimony whereof, I aflix my signaof the ends of the fan, and blades included ture, in the presence of two Witnesses. in said fan radiating fromtheir axis of ro- BYRON E. WOODBURY. tation, the inner ends of said blades diverg- Witnesses:

5 ing from a point inward of the inner ends FRANKLIN D. TONNE, of the tubes to the outer ends of the blades. ALMA TEVETO.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

WashingtonyD. G. 1 

